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huongthd838
2 năm trước
1. Hòa tan hoàn toàn 6,72g một kim loại M bằng dd HCL dư, thu đc 2,688lit khí (dktc) thu đc a gam muối khan. Tìm M và a 2. X và Y là 2 nguyên tố halogen ở 2 chu kì liên tiếp trong bảng tuần hoàn . Để kết tủa hết ion X- và Y- trong dd chứa 4,4 g hỗn hợp muối natri của chúng cần 150ml dd Agno3 0,4M. Xác định hai tên nguyên tố X,Y
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